Method and system for audio CODEC voice ADC processing

• US 7,515,071 B2
• Filed: 11/30/2006
• Issued: 04/07/2009
• Est. Priority Date: 11/30/2006
• Status: Expired due to Fees

• Current Assignee: Avago Technologies General IP PTE Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Chang, Li Fung, Kong, Hongwei
• Primary Examiner(s): Barnie; Rexford
• Assistant Examiner(s): LAUTURE, JOSEPH J
• Application Number:
  US11/565,591
• Publication Number:
  US 20080129558A1
• Time in Patent Office: 859 Days
• Field of Search: 341/50, 341/143, 341/155, 341/118, 341/120, 455/226.2, 455/333, 455/552, 455/415, 455/567
• US Class Current: 341/50
• CPC Class Codes: H03M 3/496 Details of sampling arrangements or methods

Abstract

Methods and systems for audio CODEC voice ADC processing are disclosed. Aspects of one method may include using a decimating filter that may be enabled to generate 13 MHz, 9-level digital output signal from a 26 MHz, 3-level digital input signal. The 13 MHz, 9-level digital output signal may be processed for RF transmission, for audio output to an output device, and/or utilized for testing by a test fixture, for example. The 13 MHz, 9-level digital output signal may be further processed to generate a 6.5 MHz, 33-level digital signal. The 6.5 MHz, 33-level digital signal may be converted to an analog signal, and processed for audio output and/or testing. The 13 MHz, 9-level digital output signal may also be processed to generate a 40 KHz, 17-bit digital signal, which may be communicated to a test equipment or further processed for RF transmission.

Claims

1. A method for processing signals in a baseband processor of a handheld, wireless communication device, the baseband processor comprising an audio codec, a digital signal processor (DSP), a core processor and a memory, the memory being shared by the DSP and the core processor, the method comprising:

supporting multiple wireless communication protocols and multiple antennas;

supporting separate processing paths for at least a general audio path, a voice path and a polyphonic ringer path before mixing the supported, separate processing paths;

decimating a multi-level digital input signal by M, where M is an integer that is greater than or equal to 2; and

generating an output digital signal having a number of signal levels greater than said multi-level digital input signal by processing said decimated multi-level digital input signal.

2. The method according to claim 1, wherein said multi-level digital input signal comprises digital samples at a rate of 26 mega-samples per second.

3. The method according to claim 1, wherein said multi-level digital input signal comprises three signal levels.

4. The method according to claim 1, wherein said output digital signal comprises nine signal levels.

5. The method according to claim 1, comprising processing said output digital signal for at least one or both of the following:

testing and RF transmission.

6. The method according to claim 1, comprising processing said output digital signal for at least one or both of the following:

audio output and testing.

7. The method according to claim 1, comprising decimating said output digital signal by N, where N is an integer that is greater than or equal to 2.

8. The method according to claim 7, comprising processing said decimated said output digital signal to generate a 33-level digital signal.

9. The method according to claim 8, comprising processing said 33-level digital signal for at least one or both of the following:

audio output and testing.

10. The method according to claim 1, wherein the baseband processor supports a Bluetooth protocol.

11. The method according to claim 10, wherein the baseband processor supports at least two of WCDMA, HSDPA, GSM, GPRS and EDGE.

12. The method according to claim 1, wherein the baseband processor supports at least two of WCDMA, HSDPA, GSM, GPRS and EDGE.

13. The method according to claim 1, comprising converting a signal rate of said multi-level input digital signal, wherein said converted signal rate is converted to analog signal for communication to at least one of:

an output device and a test fixture.

14. The method according to claim 1, comprising converting a signal rate of said multi-level input digital signal, wherein said converted signal rate is digitally processed for communication to a test fixture.

15. A machine-readable storage having stored thereon, a computer program having at least one code section that processes signals, the at least one code section being executable by a baseband processor of a wireless, handheld communication device, the baseband processor supporting a Bluetooth protocol and supporting at least two cellular communication protocols, the baseband processor supporting multiple antennas, the baseband processor supporting separate processing paths for at least a general audio path, a voice path and a polyphonic ringer path before mixing the supported, separate processing paths, the code section causing the baseband processor to perform at least converting a signal rate of an input digital signal, wherein said converted signal rate is converted to analog signal for communication to at least one of:

an output device and a test fixture.

16. The machine-readable storage according to claim 15, wherein the at least two cellular communication protocols comprises at least two of WCDMA, HSDPA, GSM, GPRS and EDE EDGE.

17. A machine-readable storage having stored thereon, a computer program having at least one code section that processes signals, the at least one code section being executable by a baseband processor of a wireless, handheld communication device, the baseband processor supporting a Bluetooth protocol and supporting at least two of WCDMA, HSDPA, GSM, GPRS and EDGE, the baseband processor supporting multiple antennas, the baseband processor supporting separate processing paths for at least a general audio path, a voice path and a polyphonic ringer path before mixing the supported, separate processing paths, the code section causing the baseband processor to perform at least the following converting a signal rate of an input digital signal, wherein said converted signal rate is digitally processed for communication to a test fixture.